Buttonhole-sewing attachment for sewing-machines.



E. J. BOYLER 8: W. KOHLER. BUTTONHOLE SEWING ATTACHMENT FOR SEWING MACHINES.

APPLICATION FILED JAN; 3. 1910.

Patented Feb. 7; 1911.

3 SHEETS-SHEET l.

WITNE$3ESx E. J. BOYLER 6: W. KOHLERU BUTTONHOLE SEWING ATTACHMENT FOR SEWING MAGHINBS.

APPLICATION FILED JAN. 3, 1910.

Patented Feb. 7, 1911.

WITNESSE S:

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7 ww 5% W T E. J. BOYLER & W. KOHLER. BUTTONHOLE SEWING ATTACHMENT FOR SEWING MACHINES.

APPLICATION FILED JAN. 3. 1910.

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Patented Feb. 7, 1911.

3 SHEETS-SHEET 3.

EMANUEL J. BOYLER, or HAM ONTARIO,

ILTON, AND WILLIAM KOHLER, or snnmaumvn,

CANADA.

BUTTONHOLE-SEWING ATTACHMENT FOR SEWING-MACHINES.

' To all whom-it may concern.-

v Specification of Letters Patent.

Patented Feb. '7, 1911.

Application filed January 3, 1910. Serial No. 536,245.

Be itknown that we, EMANUEL J BOYLER,

, of thecity Shelbu-rne,

Prov nce of of Hamilton, in, \Vntworthhnd Province of Ma, and WILLIAM KoHLEn,

in the county Ontario,

the county of Ontario, Canof the village of of -Dufferin and Canada, have invented ceitain new and useful Improvements in Buttonhole-"Sewing mg-Machines Attachments for Sewand we hereby declare that .thefollowing is a full, clear,.and exact description of the same.

, sewing 11s inj'vention relates to a button hole attachment which-will advance the .15 material lengthwise of thebuttonhole, stitch by s'titcl1,-"and reciprocate it laterally of the button; hole, at each operation of the needle bar, when the material, and

stationary when the vent the mate during the lateral movement of, the the attachment is is withdrawn from the will hold the material needle is in it. To pre rial ridging against the needle former, provided with a stretcher needle which mountedon a traveling arm, and this arm is moved lengthwise traveling nut ,of the button hole by a actuated by a feed. screw, the

feed screw being rotated, through-the agency of: a rock shaft and actuated by anoperating I nn'iveinents of the,

intermediateconnections lever, during the needle bar; ,the traveling arm being reciprocated laterallyf of the button hole by an oscillator actuated by the operating lever and intermediate connections co-incid ment, as hereinafter set 'larly pointed out in the ent with its lengthwise moveforth and particuclaims.

-For an understanding of the invention,

' reference is t scription and- 40 ings inwhich:

Figurel, is a ton hole sewing attachment. detail view ofthe oscillator.

o behad to the following de to the' accompanying drawperspective view of the but- Fig. 2, is a Fig. 3, is adetail view of the actuating means for the feed screw. Fig. 4, is

in section of feed screw.

a. perspective view partly actuating means for the.- 5, ma perspective view, of

the a the ratchet plate ratchet dogs, and part of the supporting to Fig. 4:.

frame, from the opposite side a perspective view of part of the supporting frame, showing the guideway for plate to the li means.

the stud connecting the ratchet nk'of the feed screw actuating wise of the feed screw 73 to prevent the movement of the plate on opposite sides Like characters of reference refer to like parts throughout the specification and drawings.

The stretcher a consisting of an open frame having teeth a terial at opposite sides of the button hole is provided with hubs c having a fastening de vice b by which the stretcher can be adjustahly mounted on one end d of the traveling arm (Z. The other end 03" of the traveling armis movable "into and out of the sleeve f forming part of .the oscillator g. Intermediate its ends d d'ithe traveling arm is engaged by the' carrier the traveling nut e the carrier being formed,

so that it moves the traveling arm lengthas the latter revolves, and, permits the traveling arm to reciprocate transversely of the feed screw during such movement;

The ;feed screw 71 is revolubly mounted in the supportingframe 72 and is provided with a ratchet wheel jwith which the ratchet dogs 70 it engage to rotate the feed screw. The ratchet dogs are pivoted to the ratchet plate Zhaving a stud. mvertically movable .in the guideway 0 inthe supporting frame 7). Connected with the stud m is one end of-the link y, the other end of the link being pivoted to the crank r tcnsioned by a spring link, ratchet plate,

4 and ratchet dog except when actuated by the rock shaft t oscillatng under the influence of the operating lever and needle'bar. The ratchet dog-7c is employed to rotate the feed screw in one direction and the other ratchet dog 70, is employed to rotate it tion, these dogs being pivoted to the ratchet of the feed screw and being capable of disengagement from the teeth of the ratchet wheel, sothat when one ratchet dog is engagedthe other ratchet dog will be-disengaged, the engaged ratchet dog being the operative one rotating the ratchet wheel and .feed screw to move the traveling nut along the latter. r

The crank 1' is loosely mounted on the rock shaft t and its hub is formed with a recess 2; in which engages the pin u connected with the rock shaft, thelength of the recess being greater than the width of the pin toallow of a'limited movement of.the rock shaft before the latter actuates the 72. forming part of.

crank,

in the opposite directo engage the macrank w, turns the .tlie needle bar raises the operating lever y and the latter by its engagement with the rock shaft at bringing the pin u into engagement with one end of recess a. The pin a when it engages the ends of'the recesso oscillates the crank a", the hub of which, turning with the rock shaft t,

causes the crank to move up and down in i a fixed path. The downward movement of the crank, through its pivotal connection with the link 9 lowers the latter and the stud m and ratchet plate Z, the guideway in the supporting frame causing the stud, link, and ratchet plate to move in a fixed path. As the ratchet plate descends, the. operative ratchet dog is brought into engagement with the teeth of the ratchet wheel turning the latter and the feed screw a partial revolution to move the traveling ma and advance the material one stitch lengthwise of the button hole. The descent of the needle bar lowers the operating lever causing it to turn the rock shaft in the opposite direction to its upward movement bringing the pin. a into engagement with the opposite end of the recess '0 and turning the crank 'r in an upward direction to raise the ratchet plate and ratchet dog into position where the latter will engage another tooth of the ratchet wheel. on the next upward movement of the needle bar.

Pivoted to the supporting frame p is the oscillator g and journaled between"the oscillator plates 0' is the hub (l of the oscillator sleeve 7", from which the oscillator rocks;

The sleeve f is adjustable on an arc described from the center of its hub (1 to' vary the length of the reciprocal movement of the stretcher a, one of the oscillator plates being formed with a substantially semicircular slot f for the set screw g by which the sleeve is locked in its adjusted position. The oscillator plates 0 forming part of the oscillator g are pivoted to the supporting frame p and rock from their pivotal connection therewith during the actuation of the link h, the stroke of the oscillator plates never varying duringtheir oscillation. .Vhen the set screw 9 is adjusted in the semicircular slot to bring the sleeve), nearer the ivotal axis of the oscillator, the length of tie oscillating movement of the sleeve is I j usted to move the shortened, and when the set screw is adthe sleeve 7 farther from the pivotal axis, the movement is lengthened, to respectively decrease or increase the length of the reciprocating movement of the traveling arm, and consequently the length of the stitch transversely of the button hole. The oscillator rocks back and forth and imparts reciprocal motion I stretcher a, the arm during its reciprocal movement working through the carrier h when the latter is moving lengthwise of the feed screw. The end ll of the arm (Z works into and out of the-sleeve f drying the movement of the travelingnut as it feeds respectively away from and toward the ratchet wheel j this provision being necessary to compensate for the changes in the relative position of the traveling arm to the oscillator as the traveling nut moves from one end to the other of the feed screw;

lonnected to the oscillator g is one end of a link It the opposite end of the link being pivoted to a wrist nccted to the supporting arm j forming part of the supporting frame 3;. arm 9' is provided with two stops j with which engages a pin Z projectingfrom the link It to limit the motion of the link and oscillator and prevent the overthrow of the latter when the needle bar is running at a high rate of speed.- formed with a triangular projection on the sides m m of which are engaged by a crank arm 0 rockably connected to the operating lever y-and tensioned by aspring 7) which maintains the crank arm in a fixed relative positionto the operating lever when the former is disengaged from the triangular projection. The crank arm 0 alternately engages the opposite'sidesm m of the triangular projection m during the upward movements of the needle bar. crank ar1n0' engages the side m" it moves the wrist plate to rock the oscillator away to the arlncl and/ plate 2" 'oscillatingly con- The supporting .The wrist plate is When the from the needle bar, and when it engages the side m it rocks the oscillator toward the needle bar, thus moving the stretcher back and forth at each-alternate stroke of the needle bar.

-By utilizing the feed screw and traveling nut' to move thestretcher in one direction and the oscillator to move it transversely thereto, we have succeeded in'producing an attachment for sewing button holes by which the material is advanced lengthwise of the button hole and moved transversely to the length of the button hole at eaclr operation of the needle bar.

The construction and arrangement'of the parts hereinbefore described may be modifled and varied within the scope of the 'ap pended claims without departing from the rinciple of the invention, the essential eature of which is to' move the material the needle bar, and a suitable intermediate lengthwise of the button hole stitch by stitch, so that the stitches may follow each other in' proper sequence and to move the material transversely to the length of the button hole so that the material may be stitched at the edge of the button hole-and again .at a selected distance therefrom to obtain a secure foundation for the stitches, and to utilize mechanism for creating the lengthwise and transverse movements which are timed to occur coincident with each other.

Having thus fully described our invention what we claim as new and desire to secure by Letters Patent isz- 1. In a button hole sewing attachment, a. feed screw, a traveling nutmovable on the feed screw, a ratchet wheelfor the feed screw, a movable ratchet plate, a ratchet dog pivoted to the ratchet plate, a stud for the ratchet plate, a link connected to the stud, a crank ivotally connected to the link, a rock shaft For the crank operable by theneedle bar, and a cloth holding means-moved by the traveling 'nut.

2. In a button hole sewing attachment, a feed screw, a traveling nut movable on the feed screw, a ratchet wheel for the feed screw, a movable ratchet plate, a ratchet dog pivoted to the ratchet plate,- a stud for the ratchet plate, a link connected to the stud, a crank pivotally connected to the link, a rock shaft, a lever actuating the rock shaft, and a l cloth holding means moved by the travelin nut.

3. In a button hole sewing attachment, a feed screw, a traveling nut movable on the feed screw, a r tchet wheel for the feed screw, amovable ratchet plate, a ratchet dog pivoted to the ratchet plate, a stud for the ratchet .plate, a link connected to the stud, a crank pivotally connected to the link, a rock shaft, a lever actuating the rock shaft, a cloth holding means moved by the traveling nut, an oscillator actuating the cloth holding means, an arm for the oscillator, a triangular wrist plate pivoted to the arm, and. a crank for thelever actuating the wrist plate to cause the movement of the arm.

4.1L button hole sewing attachment comprising an oscillator consisting of two oscillator plates'and a sleeve adjustably journaled between them, a wrist plate having a triangnlar projection, a link connecting the wrist plate and oscillator, an operating lever, and a tensioned crank arm roekably' connected to the operating lever engaging with the triangular projection of the wrist plate. 5

Toronto, December 11th, 1909.

EMANUEL J. BOYLER. WILLIAM KOHLERQ Si ned in the )resence of- CHAS. H. ltrcrrns, OLIVE BATEMAN. 

